改性氧化钛光催化氧化单质汞性能及其影响因素研究进展

doi:10.16085/j.issn.1000-6613.2021-0425

摘要/Abstract

摘要：

汞是煤中普遍存在的一种剧毒非必需元素，燃煤烟气汞污染防治已成为国家重点关注和研究热点。本文系统介绍了光催化氧化单质汞的氧化钛基催化剂，包括形貌调控氧化钛基催化剂、金属改性氧化钛基催化剂、非金属改性氧化钛基催化剂、半导体复合氧化钛基催化剂以及负载型氧化钛基催化剂等。比较了不同改性措施下氧化钛基催化剂光催化氧化单质汞效率，讨论了催化剂的制备方法、光源、反应温度、烟气组成以及光催化反应器等因素对其氧化单质汞效率的影响，总结了氧化钛基催化剂光催化氧化单质汞反应机理，展望了光催化脱除燃煤烟气汞的潜在应用前景与挑战，旨在为燃煤烟气汞污染防治提供参考。完善催化剂改性方法同时开展中试规模实验将会成为燃煤烟气光催化氧化单质汞的重要研究内容与发展趋势，同时也是实现光催化氧化单质汞技术工业化应用的关键。

关键词: 光催化氧化, 汞脱除, 氧化钛基催化剂, 燃煤烟气

Abstract:

Mercury is a highly toxic and useless element in coal. The prevention and control of mercury pollution in coal-fired flue gas has become a national focus and research hotspot. The titanium-based catalysts for photocatalytic mercury removal were systematically introduced, including morphology-controlled titanium, metal modified titanium, nonmetal modified titanium, semiconductor composite titanium, supported titanium. The photocatalytic mercury removal efficiency of titanium-based catalysts by different modifications was compared, and the effects of preparation method, light source, reaction temperature, flue gas composition and photocatalytic reactor on the mercury removal efficiency were discussed. Then, the reaction mechanism of photocatalytic mercury removal with titanium-based catalysts was summarized, and the potential application prospects and challenges of photocatalytic mercury removal from coal-fired flue gas were prospected, so as to provide reference for the prevention and control of the mercury pollution from coal-fired flue gas. It will be an important research and development trend to improve the catalyst modification methods and carry out pilot-scale experiments, which is also the key to realize the industrial application of photocatalytic oxidation mercury removal technology.

Key words: photocatalytic oxidation, mercury removal, titanium-based catalysts, coal-fired flue gas

中图分类号:

X773

高天, 张伊黎, 熊卓, 赵永椿, 张军营. 改性氧化钛光催化氧化单质汞性能及其影响因素研究进展[J]. 化工进展, 2022, 41(2): 690-700.

GAO Tian, ZHANG Yili, XIONG Zhuo, ZHAO Yongchun, ZHANG Junying. Research progress of modified titanium oxide photocatalytic oxidation of elemental mercury and its influencing factors[J]. Chemical Industry and Engineering Progress, 2022, 41(2): 690-700.

图/表 3

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